Flue cutter



Jan. 30, 1923. 1,443,799`

G. R. MAUPIN'. -FLuE CUTTER.

FILED NOV.7| 1921. 2 SHEETS-SHEET 2.

y if' Patented Jan. 3Q, 1923.

Medie@ UNETED STTESTENT .FFECErg FACTURING COIMPANY, OF IJIOBERLY, MISSDURE, A (lO-PARTNERSHIP lOlB/LPOSED OF JOHN W. FAESSLER, CHRSTENEA FAESSLER, LUES E, .FAESSLEPW AND GRAVES R.

. IEAUPIN.

FLUE CUTTER.

Application led November 7, 1921. Serial No. l513,268.

To all wwm t may concern.'

Be it known that I, Gniivns MAUHN. a citizen of the United States, and resident ot the city of Moberly, countY` ot Randolph, und State of Missouri, have invented certain new and useful Improvements in Flue Cutters, of Which the following is a specification containing a full, clear, and exact de scription, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements iu flue cutters, and has for its primary object a flue cutter which' can not onliT oe used for cutting` out dues, after they have been installed, tor removal, but can also ne us i to trim off l'lues to the proper length after installation.

i further object is to construct a tlue cutter' which is capable ot cutting` i'iues ou either side ot the boilerl sheet or head.

A still further object is to'construct a liuc cutter which has a sensitive feeding device so that the same can be ted while using` either hand or power drive.

ln the drawings,

Fig. l is a. side elevation of my device Awith parts in section, showing` the manner ot assembling the same.

Fig. 2 a side elevation oi the sleeve 'feed made use of.

Fig. S an end elevation of the sume.

Fig. 4 an elevation of the cutter carrier.

Fig. 5 a. diagrammatic view ot the ieed sleeve` showing the manner ot cutting` the feed slots therein.

Fig. 6 an end vien7 ofthe cutter spindle.

Fig. 7 an enlarged cross sectional vievv of the sleeve Which carries the operating; parts.

Fig. 8 an enlarged side vieuv ot one or" the studs. Y

Fig. 9 a plan vienY of the sleeve Vwhich carries the cutter and its operating parts.

In the construction ot' my device l employ a sleeve l0. This sleevev is provided at its one end with internal screwY threads ll and adjacent the screv,r threads with z slot l2 and a screw threaded opening` 13.

The end of the sleeve l0, opposite the screw threaded portion, is provided with :in enlarged cylindrical portion lil, through which a bore l5 is formed. This here recciving the cutter carrier i6. The portion iced lei is further provided With a 'iange 17, which acts as a steady rest. The cylindrical portion le 1s provided With internal screwv threads i8 Which receive the ythreaded por#l tion'lQ ofthe mandrel 20. The forward end ot-y this mandril is provided withy a cylindricil portion 2i, terminating in-a shoulder Against this shoulder is adapted to rest a Washer or disc 28 which further serves to steady the cutter when placed in the flue. rEhe disc 23 isheld in 'position by means ofthe collar and pin 25. `Within the hollowY here Q6 of the sleeve 10 is lo-V cated o. cutter feed spindle 27wvhich is pro vided adiacent its ends with enlarged cylindrical portions and 29, and formed integral 'iv' the indi-ical portion isa projection or pin 30. This pin is offset as illustrated'in F' l and 6, and isadapted to extendinto the slot 3l tormed in the cutter carrier i6; The upper portion ot the cutter carrier 16 is provided with e slot 32 into which a cutter 33 it; placed. This cutter is held in position liv means throul carrier The. sleeve l0 is provided with u iu-{v-wa'y or slot 35, into which the ond ot' a screw.' BG exends. This set screw lic-inn' carried 'by the gage 37. The purpose .L (il this 'gage heine` to adjust the depth :it

i l the cutter 2353 is inserted in the flue. ilnued over the sleeve l0 is a feed sleeve y which has cut'in its periphery' diverg-r ing teed slots 39 and 40. The slot 39 vgoverninpl the movement of the feed vsleeve ivnile the slot 40 governs the rotation ot the cutter feed spindle. 'The rear end Voi the feed sleeveBS is vprovided With a groove el. which is yadapted to receive the flange Jeed nut d3. 'As illustratedin Fips. l. 2 .and 3, that portion of the `feed sleeve having` the groove el has approximately halt thereof removed so that the rianne 2 can be inserted, rhe teed 'nut i?) is `placed over the screuwr threaded spindle L which'has its one end secured as at 45,

screw threaded portion il ot the sleeve l0. rlhe opposite end being providedivith a portion 45. so that the sainecan he either secured to a power driving means, or can he hand driven lijf mea or" i Wrench or similur article. Secured vvithin't-hev here i3 th the cutter feed spindle adjacent" ci' a pin which passes the cutter and through the cutter that the same can he secured Within the is the screw threaded end 47 of a stud ft3,.

which has a head 49 arranged with a wrench engaging surface, and placed on the stud d8 is a roller 50, which roller fits in the slot 39. Secured within the portion Q8 of the feed spindle 27 is a stud 51, which is surrounded by a similar roller 52. This roller, however, passes through the slot 12 formed in the sleeve 10, and also through the slot e0 formed in the sleeve 38.

lt will be noted from Fig. 5 that these slots 39 and et() converge from their ends and 54;, so that the ends 55 and 56 will e close together or terminate approximately t an angle f ninety degrees to each other.

The assembling and operation of my device is as follows:

After the several parts have been machined, the mandril 2O is secured within the screw threaded opening 18. rllhe cutter then secured within the cutter carrier 16 which is placed within the bore 15 formed in the cylindrical enlargement 1e. T he cutter feed spindle is then inserted in the sleeve 10, so that the pin 30 will extend in the slot 31. The feed nut 43, then placed in position in the feed sleeve 38. This portion of the device is then slipped over the sleeve 1G. The feed screw de is then inserted through the feed nut 43, and the device secured within the sleeve 10 by means of the threaded portion 4:5. lifter this assembling has been accomplished, the gage 37 having heen attached prior to the securing of the sleeve 38, the sleeves are so turned as to permit the insertion of the studs d3 and 52, lhe feed nut 43 backed as far as the ends 53 and 5e of the slots 39 and 40 will allow. rlhis backing will result in the turning of the feed spindle 27 and consequent rotation of lraw the cutter 33 the pin 30, which will c into the cylindrical portion 14. rllhe tool is then inserted in the flue to the point where thel cutting operation is desired to be effected. The feed nut 43 then turned by means of the handle 53 until the cutter 33 contacts with the interior of the line. A slight pressure is then put on the cutter by means of a further rotation of the feed nut, and then rotary movement imparted to the portion d6, which will rotate the entire device. s the cutter 33 cuts through the flue, the same is eX- panded by a still further feeding of the feed nut 43. This forces the sleeve 38 forward on the sleeve 10. This forward movement brings the studs e3 and 51 closer together. The stud e8 being secured in the sleeve 10 causes a partial rotation of the sleeve, while the stud 51 being secured in the cutter feed spindle will be rotated, but in the opposite direction. rlhis rotation of the cutter feed spindle is allowed hy the slot 1Q formeel through the sleeve 10. This partial rotation of the feed spindle 2'? also moves the pin 30, which in rotating forces the cutter carrier outward and causes the cutter to hit-e further into the flue. The rate of feeding can he accurately determined by holding the hand on the handle 53, as when the cutter starts to bite,` a certain amount of pressure will be felt on the handle. rlhis makes my device very sensi tive and it is possible to use either hand or power drive to operate the device. This method of procedure followed until the flue is cut through, which can be readily determined by the release of resistance on the feed handle lifter the flue has been cut through, the driving mechanism is stopped, and the feed nut i3 reversed, which will again withdraw the cutter and allow the tool to ne removed,

By the use of mj device it is possible to insert tubes in a boiler which are longe-r than ultimately required, and the encess of such length can be readily cut off after the tube has been seated in the boiler.

l may also use my tool for cutting the ends off of tubes which have not been secured within boiler,l althou the length of such cutting oif is determined by the distance of which the gage can be set back. l have also found by experiment that by using a feed `sleeve having` two slots cut therein as illustrated, that it is possible to make a much shorter tool than would be required where only one slot is used. Since by usingY two slots and varying the 'inclination of these slots toward each other, the rato of feeding can he increased or decreased at will. llurtherniore, hy the use of my feeding device it is possible to construct a tool that can he used either by hand or power drive.

Having fully described' my invention, what l claim is: i

1. A lue cutter comprising a sleeve, a cutter carrier locad d in said sleeve. a cutter mounted in said carrier, a second sleevcharing converging slots surrounding the first mentioned sleeve, means for imparting longitudinal movement to the second mentioned sleeve, means projecting through the slots formed in the seco-nd mentioned sleeve for feeding the cutter carrier into and out of said first mentioned sleeve and a gauge for regulating the depth of insertion of said cutter within a flue.

2. ifi due cutter comprising a sleeve, a cutter carrier located in said sleeve,` a cutter mounted in said carrier, a second sleeve having converging slots surrounding the first mentioned slee fe, a feed nut, means projecting through the slots. l id in the second mentioned sleeve for feeding the cutter carrier into and out of said first mentioned sleeve and a gauge for regulating the depth of insertion of said .itter within a flue.

A flue cutter comprising a sleeve lia-ving an enla ed end, a cutter carrier slidahly located in said enlarged end, a cutter feed spindle located in said sleeve and engaging with the cutter carrier, a second sleeve having converging slots located on the first mentioned sleeve, a roller carried by the feed spindle and projecting through the first mentioned sleeve and into one of said slots in the second mentioned sleeve, a roller secured to the first mentioned sleeve and projecting into the remaining s lot of the second mentioned sleeve, means for feeding the second mentioned sleeve backward and forward on the first mentioned sleeve, and means for rotating the first mentioned sleeve.

4. A fine cutter comprising a sleeve having an enlarged end, a cutter carrier slidably located in said enlarged end, a cutter feed spindle loca-ted in said sleeve and engaging with the cutter carrier, a second sleeve having converging slots located on the first mentioned sleeve, a roller carried by the feed spindle and projecting through the first mentioned sleeve and into one of said slots in the second mentioned sleeve, a roller secured to the first mentioned sleeve and projecting into the remaining slot of the second mentioned sleeve, means for feeding the second mentioned sleeve backward and forward on the first mentioned sleeve, a gauge adjustably carried by the first mentioned sleeve for limiting the depth of insertion of the cutter in a iue, and means for rotating the first mentioned sleeve.

5. A flue cutter comprisingv a sleeve, a cutter carrier mounted in said sleeve, a feed spindle located in the sleeve for feeding said cutter carrier into and out of the sleeve, a second sleeve having converging slots slidably mounted on said first mentioned sleeve, separate means carried by the feed spindle anl first mentioned sleeve adapted to be operated by the slots in the second mentioned sleeve whereby the cutter carrier is fed into and out of the sleeve, and means for slidably operating the second mentioned sleeve.

6. A flue cutter comprising a sleeve, a cutter carrier mounted in said sleeve, a feed spindle located in the sleeve for feeding said cutter carrier into and out of thesleeve, a second sleeve having converging slots slidably mounted on said first mentioned sleeve, separate means carried by the feed spindle and first mentioned sleeve adapted to be opera-ted by the slots of the second mentioned sleeve whereby the cut-ter carrier is fed into and out of the sleeve, means for rotating the cutter, and means for operating the second mentioned sleeve.

7. A flue cutter comprising a sleeve, a cutter carrier mounted in said sleeve, a feed spindle located in the sleeve for feeding said cutter carrier into and out of the sleeve, aV

second sleeve having converging slots slidably mounted on said first mentioned sleeve, separate means carried by the feed spindle and first mentioned sleeve adapted to be si-l multaneously operated by the slots of the lsecond mentioned sleeve whereby the cutter carrier is fedl into and means for rotating the slidably operating the out of the sleeve, cutter, means for second. mentioned sleeve, and an adjustable gauge for limiting the depth of insertion of the cutter.

8. A flue cutter comprising a sleeve, a cutter carrier mounted in said sleeve, a feed spindle located in the sleeve for feeding said cutter carrier into and out of the sleeve, a second sleeve having convergingl slotsslidably mounted on said first mentioned sleeve,

separate means carried by the feed spindle and first mentioned sleeve adapted to engage with and be operated by the slots in said second mentioned sleeve whereby the cutter carrier is fed into and out 0f the sleeve, means for slidably operating the sec'- i ond mentioned sleeve, and an adjustable gauge for limiting the depth of insertion of the cutter. n

In testimony whereof, I have naine to this specification.

GRAVES R. MAUPIN.

signed my 

